[Limitations of reconstruction - prostheses].

Fractures of the proximal humerus are common, particularly seen in elderly, female patients. Using open reduction and internal fixation good clinical results can be achieved in general. But even today not every problem has been solved in the treatment of proximal humeral fractures. Varus displaced fractures are particularly challenging, especially when the medial column is destroyed. Anatomical reduction of the humeral head and medial bone contact are crucial for a good surgical outcome. Otherwise a secondary varus collapse and/or an implant failure are predictable. Further challenges are the intra-articular fracture patterns, as well as fractures with an initial ischemic humeral head. The indications for prosthetic replacement are always present if an initially stable internal fixation could not be achieved. The reverse fracture prostheses represent an increasingly common treatment option; however, the indication should be reserved for the elderly over 75 years.